51085104823 has 2 divisors, whose sum is σ = 51085104824. Its totient is φ = 51085104822.

The previous prime is 51085104821. The next prime is 51085104871. The reversal of 51085104823 is 32840158015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51085104823 - 2¹ = 51085104821 is a prime.

It is a super-2 number, since 2×51085104823² (a number of 22 digits) contains 22 as substring.

Together with 51085104821, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51085104821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25542552411 + 25542552412.

It is an arithmetic number, because the mean of its divisors is an integer number (25542552412).

Almost surely, 2^51085104823 is an apocalyptic number.

51085104823 is a deficient number, since it is larger than the sum of its proper divisors (1).

51085104823 is an equidigital number, since it uses as much as digits as its factorization.

51085104823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38400, while the sum is 37.

The spelling of 51085104823 in words is "fifty-one billion, eighty-five million, one hundred four thousand, eight hundred twenty-three".